Controlling the spontaneous precipitation of silver nanoparticles in sol-gel materials

Pu-Wei Wu, Bruce Dunn, Vinh Doan, Benjamin J. Schwartz, Eli Yablonovitch, Masayuki Yamane

Research output: Contribution to journalConference articlepeer-review

43 Scopus citations


The mechanisms responsible for spontaneous silver precipitation in silver-doped sol-gel materials are identified. The chemistry of the solvent phase is found to be the critical factor in controlling this phenomenon. The addition of HCl as catalyst leads to the formation of AgCl and subsequent formation of silver upon light exposure. Another factor leading to silver precipitation is the reducing capability of methanol radicals. Silver precipitation is inhibited by simply washing out the pore solvents by a solvent exchange method.

Original languageEnglish
Pages (from-to)249-252
Number of pages4
JournalJournal of Sol-Gel Science and Technology
Issue number1-3
StatePublished - 1 Dec 2000
Event10th International Workshop pn Glass and Ceramics, Hybrids and Nanocomposites from Gels - Yokohama, Jpn
Duration: 20 Sep 199924 Sep 1999

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